Apple cider vinegar has no benefit for baby chicks, and very little benefit besides being a natural antibacterial. Using it in young chicks upsets the balance of microflora developing in the digestive system. The best thing one can do for their chicks is use a probiotic in their diet. Do not use yogurt since the calcium content is too high. Use a vitamin-electrolyte and extracted probiotic like Probios in the water. Always follow label directions as each are specific to that product. In addition to probiotics, a high quality feed like this is the most important:
 
KING BRAND
ORGANIC CHICK START
& GROW CRUMBLES
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GUARANTEED ANALYSIS
Crude Protein, not less than..........…………………………...................22.0%
Lysine, not more than…………………………………………………..……1.0%
Methionine, not less than……………………………………………………0.4%
Crude Fat, not less than................................…………………………......2.5%
Crude Fiber, not more than......................……………………………........5.0%
Ash, not more than………………………………..……………………..……8.0%
Calcium, not less than..............................……………………………........0.8%
Calcium, not more than.............................…………………………….......1.2%
Phosphorus, not less than...........................……………………………....0.6%
Sodium, not more than..............................……………………………......0.3%
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INGREDIENTS
Organic Soybean Meal, Organic Wheat, Organic Corn, Ground Limestone, Organic Flaxseed, Monocalcium &
Dicalcium Phosphate, Diatomaceous Earth, Mineral Sea Salt (Redmond), DL Methionine, Hydrolyzed Yeast,
Brewers Dried Yeast, Calcium Carbonate, Organic Garlic Granules, Organic Horseradish Powder, Organic Star
Anise Oil, Organic Juniper Berry Oil, Reed Sedge Peat, Calcium Bentonite, Choline Chloride, Manganese
Oxide, Niacin Supplement, Zinc Oxide, Vitamin E Supplement, Ferrous Sulfate, D-Calcium Pantothenate,
Vitamin A Supplement, D-Biotin, Riboflavin Supplement, Tribasic Copper Chloride, Vitamin B-12 Supplement,
Vitamin D3 Supplement, Pyridoxine Hydrochloride, Menadione Dimethyl Pyrimidinol Bisulfate (Source of
Vitamin K activity), Ethylene Diamine Dihydroiodide, Thiamine Mononitrate, Folic Acid, Sodium Selenite.
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FEEDING DIRECTIONS
1. Feed Organic Chick Start & Grow Crumbles free choice as the sole ration to growing chickens.
2. Store Organic Chick Start Crumbles in a cool, dry area. Never feed moldy or insect-infested feeds.